/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/TriangleMesh.h
Hierarchy will only go down to lods as small as MinSpatialLodSize.
template<typename T> void BuildSpatialHash ( const TConstArrayView< [TVec3](API\Runtime\ChaosCore\Chaos\TVec3)< T >> & Points, [TSpatialHashType](API\Runtime\Chaos\Chaos\FTriangleMesh\TSpatialHashType)< T > & SpatialHash, const T MinSpatialLodSize ) const